// $Id: RecordingCoverDisplayController.java 372 2009-05-25 08:51:25Z huijzer $

/*    
    Aoide is a web-based music catalog using the Spring Framework.
    Copyright (C) 2009  Arjan Huijzer

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
    
    You can contact Arjan Huijzer by sending an e-mail to huijzer@gmail.com.
*/

package org.aoide.web.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.aoide.constants.ImageConstants;
import org.aoide.core.persistence.Recording;
import org.aoide.core.persistence.RecordingDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import com.google.appengine.api.images.Image;
import com.google.appengine.api.images.ImagesService;
import com.google.appengine.api.images.ImagesServiceFactory;
import com.google.appengine.api.images.Transform;

@Controller
@RequestMapping("/recordingCoverDisplay.action")
public class RecordingCoverDisplayController {

	@Autowired
	private RecordingDao dao;

	@RequestMapping(method = RequestMethod.GET)
	protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {

		String uuid = (String) request.getParameter(Recording.UUID);
		Recording recording = getDao().load(uuid);
		response.setContentType(ImageConstants.MIME_JPEG);

		String sizeParameter = request.getParameter(ImageConstants.SIZE);
		if (sizeParameter != null) {
		
			Integer size = new Integer(sizeParameter);
			
			byte[] oldImageData = recording.getCover().getBytes();
	        ImagesService imagesService = ImagesServiceFactory.getImagesService();
	        Image oldImage = ImagesServiceFactory.makeImage(oldImageData);
	        Transform resize = ImagesServiceFactory.makeResize(size, size);
	        Image newImage = imagesService.applyTransform(resize, oldImage);
	        byte[] newImageData = newImage.getImageData();
	        response.getOutputStream().write( newImageData );
			
		} else {
			response.getOutputStream().write( recording.getCover().getBytes() );
		}
		
		return null;
	}

	public RecordingDao getDao() {
		return dao;
	}

	public void setDao(RecordingDao dao) {
		this.dao = dao;
	}
        
}
